Add vbutil_what_keys utility to figure out how a disk image is signed.

BUG=none
TEST=none

Change-Id: I8a2e0d07384f0437064b964c6b292af9c3a67ea1
Reviewed-on: http://gerrit.chromium.org/gerrit/2802
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Tested-by: Bill Richardson <wfrichar@chromium.org>
3 files changed